Graphene-Si Schottky diode in environmental conditions at low NH3 ppm level, Polichetti, T., Ricciardella F., Fedi F., Miglietta M.L., Miscioscia Riccardo, Massera E., Di Francia G., Nigro M.A., Faggio G., Malara A., et al. , 2014 IEEE 9th Nanotechnology Materials and Devices Conference, NMDC 2014, p.23-26, (2014)